docs: update docusaurus to v3 (#5625)

* update dependencies

* update onboarding mdx

* fixes for mdx issues

* fixes for mdx compatibility

* resolve mdx errors

* fixes in reference

* fix check errors

* revert change in vale action

* fix node version in action

* fix summary in markdown

www/packages/docs-ui/src/components/BorderedIcon/index.tsx

@@ -5,8 +5,7 @@ import { IconProps } from "@medusajs/icons/dist/types"
 
 export type BorderedIconProps = {
   icon?: string
-  IconComponent?: ((props: IconProps) => React.JSX.Element) | null
-  // IconComponent?: React.FC<IconProps> | null
+  IconComponent?: React.FC<IconProps> | null
   wrapperClassName?: string
   iconWrapperClassName?: string
   iconClassName?: string